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Old 06-20-2016, 01:29 PM   #1
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Default Magazine Makes 20 rwhp With Heat Shield on LS1



This reeks of bullshit, but what do you guys think? Maybe this would generate higher dyno numbers, but on the road might not make that big of a difference considering the cooling effect of moving all that fresh, cool air into the engine at speed. Quarter-mile tests would have been nice too.

I also find it lazy that they didn't even record intake air temps. C'mon. A $15 wi-fi ODB adapter and free app can read those.



“Budget friendly” horsepower. What does that mean? What’s budget friendly for some can be budget breaking for others. Rarely in the performance world do you come across a universally budget friendly part that can significantly increase horsepower and torque. Not quite a unicorn or capturing a leprechaun and his pot of gold, more like fishing and trying to catch “the big one” to show off to your friends. Thanks to Heatshield Products, owners of LS-powered cars and trucks just set the hook on the big one!

Heatshield Products leads the industry in developing thermal barriers for a variety of areas on a car, truck or motorcycle. Their product lineup includes turbo shields, exhaust system thermal barriers and a variety of other products including the I-M Shield. This specially designed thermal barrier shields the underside of the intake from heat that comes from the top of the engine. This heat “soaks” the intake manifold, and that heat is then transferred to the air running through the intake while the engine is running. Hotter air means less density, and less air going into the combustion chamber. Bottom line: less power.

At first we were skeptical about the effectiveness of the I-M Shield and its claims. So, we grabbed an LS1-powered C5, with only some modest mods that wouldn’t skew our results, and went to AntiVenom Performance in Seffner, Florida, to do an honest test. Our method was to baseline the car both cold and hot, install the I-M Shield and retest in the same method, cold then hot. Read on to see what we found.

14-15. Taking similar readings to what we did at the start after running our post install test. The floor of the intake was reading 102.7 degrees F. That’s a drop of 43 degrees. This decrease in temp translates into lower air intake temps, because there is less heat for the intake manifold to transfer to the air going through the intake.

16. And here’s the breakdown on the dyno. Our gains weren’t just at peak power, but steady across the entire powerband. That much of a gain in the bottom end, mid-range, and top end translates to serious performance gains. All from something that costs less than $60, and takes about an hour to install. You can’t beat that!

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Old 06-20-2016, 01:30 PM   #2
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Does it come with a free tornado fuel saver?
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Old 06-20-2016, 01:52 PM   #3
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put those magnets on your fuel line too
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Old 06-20-2016, 02:02 PM   #4
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same as trying to isolate the top side blowers from metal on metal heat transfer. I had this installed but don't fully believe in the theory after someone posted some additional data.

Fasterproms Thermal Reduction Plates for reducing heat soak- Lots of info inside - Corvette Forum
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Old 06-20-2016, 02:08 PM   #5
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Yeah but that was the whole premise for switching to thermoplastic intake manifolds anyways... the less the heat from the engine affect the air flowing into the head.
It does sound like a cold front might have moved through
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Old 06-20-2016, 02:12 PM   #6
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Unless the air temp was reduced to where the tune added a bunch of timing, I have a hard time believing this. They did the same thing with a coyote motor. Similar results.


But I bet the magazine has a new company advertising with them.
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Old 06-20-2016, 02:18 PM   #7
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on the stock tune of the ZR1's, you lose timing over 130 degrees and beyond and thus power, I think I was running 200-250 degrees on the road course last year, upgraded H/E cooling parts and need to get back out there and see where the temps are. Stress tested out on the street and all is well but you can get no where near road course stress testing without going to jail or totaling your car
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Old 06-20-2016, 02:20 PM   #8
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I also find it lazy that they didn't even record intake air temps. C'mon. A $15 wi-fi ODB adapter and free app can read those.
Where are intake temps read on an LS1? In the intake manifold? I could have sworn my Ford's were read in pre-throttle body, which would have only told what the ambient temperature they were reading was at.
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Old 06-20-2016, 02:21 PM   #9
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I can't see it rendering a consistent 20hp gain, certainly not without a tune. I don't really buy there is that much thermal transfer to a composite intake anyway. Certainly not enough to make 20hp.

Colder air does mean you can deliver more fuel, but 20hp seems like an aweful lot. And for the car to do that, it needs trims to adjust... which means it really must drop temps pretty significantly for any real gains.
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Old 06-20-2016, 02:22 PM   #10
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Where are intake temps read on an LS1? In the intake manifold? I could have sworn my Ford's were read in pre-throttle body, which would have only told what the ambient temperature they were reading was at.
It's either integrated into the MAF, or its in a rubber grommet in the intake tube.
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Old 06-20-2016, 02:25 PM   #11
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It's either integrated into the MAF, or its in a rubber grommet in the intake tube.
Really to see if intake temps were THAT much lower, they would've needed to throw a sensor in the manifold itself then, to get a complete story
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Old 06-20-2016, 02:26 PM   #12
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I'd have to see quantifying data using Weber grill thermometers
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Old 06-20-2016, 02:30 PM   #13
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Not gonna call BS yet but the composite intake manifolds on cars today are already a heat shield. I get why the performance industry sells the "air gap" carb style aluminum intake manifolds but I still don't see how they could of dropped air temps and made the air that much denser for 20 more horses.
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Old 06-20-2016, 03:20 PM   #14
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I'd go to the hobby store and buy $20 worth of gold leaf and give that bitch the McLaren F1 treatment
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Old 06-20-2016, 03:37 PM   #15
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I need one of these!!!
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Old 06-20-2016, 06:08 PM   #16
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I'd go to the hobby store and buy $20 worth of gold leaf and give that bitch the McLaren F1 treatment
brz has that and a snorkel pretty close to mclaren afterwards

why no IAT? can record right off OBD2 i have mine for road courses in my data
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Old 06-20-2016, 06:19 PM   #17
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IAT's are measured with the MAF or intake tube so it'd be worthless.
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Old 06-20-2016, 08:32 PM   #18
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doesn't the ecu use that one for input?
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